<template>
  <div id="homePage">
    <!-- 搜索框 -->
    <div class="search-bar">
      <a-input-search
        placeholder="从海量图片中搜索"
        v-model:value="searchParams.searchText"
        enter-button="搜索"
        size="large"
        @search="doSearch"
      />
    </div>
    <!-- 分类 + 标签 -->
    <a-tabs v-model:activeKey="selectedCategory" @change="doSearch">
      <a-tab-pane key="all" tab="全部" />
      <a-tab-pane v-for="category in categoryList" :key="category" :tab="category" />
    </a-tabs>
    <div class="tag-bar">
      <span style="margin-right: 8px">标签：</span>
      <a-space :size="[0, 8]" wrap>
        <a-checkable-tag
          v-for="(tag, index) in tagList"
          :key="tag"
          v-model:checked="selectedTagList[index]"
          @change="doSearch"
        >
          {{ tag }}
        </a-checkable-tag>
      </a-space>
    </div>

    <a-list
      :grid="{ gutter: 16, xs: 1, sm: 2, md: 3, lg: 4, xl: 5, xxl: 6 }"
      :data-source="dataList"
      :pagination="pagination"
    >
      <template #renderItem="{ item: picture }">
        <a-card hoverable style="width: 240px" @click="doClickPicture(picture)">
          <template #cover>
            <img :alt="picture.name" :src="picture.url" style="height: 180px; object-fit: cover" />
          </template>
          <a-card-meta :title="picture.name">
            <template #description>
              <a-flex>
                <a-tag color="green">{{ picture.category ?? '默认' }}</a-tag>
                <a-tag color="green" v-for="tag in picture.tags" :key="tag">{{ tag }}</a-tag>
              </a-flex>
            </template>
          </a-card-meta>
        </a-card>
      </template>
    </a-list>
  </div>
</template>
<script lang="ts" setup>
import { computed, onMounted, reactive, ref } from 'vue'
import { listPictureTagCategoryUsingGet, listPictureVoByPageUsingPost } from '@/api/pictureConftroller.ts'
import { message } from 'ant-design-vue'
import { useRouter } from 'vue-router'

const dataList = ref<API.PictureVO[]>([])
const total = ref(0)

const searchParams = reactive<API.PictureQueryRequest>({
  current: 1,
  pageSize: 10,
  searchText:"",
  category:""
})

const pagination = computed(() => {
  return {
    current: searchParams.current ?? 1,
    pageSize: searchParams.pageSize,
    total: total.value,
    showSizeChanger: true,
    onChange: (page, pageSize) => {
      searchParams.current = page
      searchParams.pageSize = pageSize
      fetchData()
    },
  }
})

const fetchData = async () => {
  // 转换搜索参数
  const params = {
    ...searchParams,
    tags: [],
  }
  if (selectedCategory.value !== 'all') {
    params.category = selectedCategory.value
  }
  selectedTagList.value.forEach((useTag, index) => {
    if (useTag) {
      params.tags.push(tagList.value[index])
    }
  })
  const res = await listPictureVoByPageUsingPost(params)
  if (res.data.data) {
    dataList.value = res.data.data.records ?? []
    total.value = res.data.data.total ?? 0
  } else {
    message.error('获取数据失败，' + res.data.message)
  }
}

const doSearch = ()=>{
  searchParams.current = 1
  fetchData()

}
onMounted(() => {
  fetchData()
})

const categoryList = ref<string[]>([])
const selectedCategory = ref<string>('all')
const tagList = ref<string[]>([])
const selectedTagList = ref<string[]>([])
// 获取标签和分类选项
const getTagCategoryOptions = async () => {
  const res = await listPictureTagCategoryUsingGet()
  if (res.data.code === 0 && res.data.data) {
    // 转换成下拉选项组件接受的格式
    tagList.value = res.data.data.tagList??[]
    categoryList.value = res.data.data.categoryList??[]
  } else {
    message.error('加载选项失败，' + res.data.message)
  }
}

onMounted(() => {
  getTagCategoryOptions()
})

const router = useRouter()
// 跳转至图片详情
const doClickPicture = (picture) => {
  router.push({
    path: `/picture/${picture.id}`,
  })
}

</script>

<style scoped>
#homePage .search-bar {
  max-width: 480px;
  margin: 0 auto 16px;
}
</style>
